/编写一个完整的C语言程序，以单链表为存储结构，对一批学生的成绩进行管理，要求实//现如下功能：

//1.通过键盘输入若干学生的学号、成绩，将数据保存一个单链表中。

//2.查询并输出指定学号的学生成绩。

//3.统计并输出不及格人数。

//4.按从高到低的顺序输出所有学生成绩

-/ Write a complete C language program to a single list for the storage structure, the results of a group of students to manage, requiring real// are the following functions:// 1. Through the keyboard input student ID number of students, performance, data save a single linked list.// 2. Query and output the specified number of school pupils.// 3. Statistics and the number of output does not pass.// 4. According to the order of output from high to low scores for all students